Solved

Gigabyte Motherboard issue - shutting down on startup before BIOS

I'm using a Gigabyte H77m-D3H in a rebuild. Never had any problems with this board for the last 4 years.

Just put the motherboard in a new HTPC case with a new PSU. I noticed that my SSD was running really slow so I went into the BIOS setup and selected "Use Optimum settings", saved and restarted. First time it blue screened when starting WIndows10, reset and said it woud run diagnostics to fix the error. Reset and bluescreened again. After a few restarts the PC would not boot into BIOS anymore.

It's now at the point where I plug in power and press the power button and it goes through this cycle;

1. Fans spin up for 20 seconds, no video output at all, shuts down.
2. Fans spin up for 5 seconds, no video output at all, shuts down.
3. Fans spin up, after about 10 seconds the Boot up screen flashes for 1 second and it goes into a screen which says "GIGABYTE - UEFI DualBIOS", then shuts down.



then goes back to #1 and does it all over again.

I've unplugeed all peripherals, all memory, the CMOS battery, tried to reset the CMOS, no key presses change the BIOS menu choice on the third part of the cycle. Tried a different PSU, tried putting it back into the original case, tried removing all of the RAM, after all of this the issue is exactly the same.

Feels like this is a corrupt BIOS from all of the tinkering around before, this motherboard has a dualBIOS and if I could just get back into the BIOS settings screen I could get it all working again.

Where do I go from here?
Reply to Mr Matt
3 answers Last reply Best Answer
More about gigabyte motherboard issue shutting startup bios
  1. Best answer
    If your board does have dual BIOS, then it should also have a dual BIOS switch, that selects which BIOS you want to use. Just select the secondary BIOS. If that doesn't work then I'm afraid that your board is damaged. Either you did something wrong during the installation process or your old board has gone bad due to ageing.

    Finally have you tried re-seating the CPU into the socket? Maybe your CPU is bad and not your board although that's rare. Motherboard's are way more fragile than CPUs.
    Reply to panathas
  2. Try taking out things you dont need.try a new cpu.
    Reply to AliMickey
  3. panathas said:
    If your board does have dual BIOS, then it should also have a dual BIOS switch, that selects which BIOS you want to use. Just select the secondary BIOS. If that doesn't work then I'm afraid that your board is damaged. Either you did something wrong during the installation process or your old board has gone bad due to ageing.

    Finally have you tried re-seating the CPU into the socket? Maybe your CPU is bad and not your board although that's rare. Motherboard's are way more fragile than CPUs.


    You were right, I had to switch to the backup BIOS, the manual says it would do this normally if the main BIOS becomes corrupted, but it didn't. To do this manually, I had to hold down the power and reset buttons for 10 seconds, then it power cycled a few times and then went into that screen I posted above with a message saying my main BIOS was corrupt and it would re-write it from the backup BIOS. A couple of minutes of flashing the BIOS and my PC is working again.

    Glad I asked here before buying a new motherboard and CPU! Thanks for the suggestion.
    Reply to Mr Matt
Ask a new question Answer

Read More

BIOS Motherboards Gigabyte